Motor-bicycle.



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4 Sheets-Sheet 2.

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W/TNESSES:

` Patented sept. I7, 190|'. E. F. HAFELFINGER.

MOTOR BICYCLE.

(Application led Dec. 1, 1900.)

4 Sheets-Shamv 3.

(No Model.)

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No. 682,682. Patented Sept. I7, |90I.

E. F. HAFELFINGER.

MOTOR BICYCLE.

(Application led Dec. 1 1900.) (No llodel.) 4 Sheets-Sheei 4.

v W/TNESSES INVENTOH A TTOHNE YS 7N: ncnms Persia C0.. PHOTO-uma.. WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

Moron-BICYCLE.

SPECIFICATION forming part of Letters Patent No. 682,682, dated September 17, 1901. Appunti@ inea December 1, 1900. i serial No. 38.292. (No man.)

bicycles driven by a combustion-motor; 'andthe object is to provide a vehicle of this character that shall be simple in its construction land in which the parts are all assembled so as to require but verylittle space or not a greater space than that of'an ordinary bicycleframe.

I will describe a motor-bicycle embodying my invention and then point out the novel features in t-he appended claims.

Reference is to be had to the accompanying drawings, formin ga part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figures 1 and 2 are opposite sido elevations of a motor-bicycle embodying my invention. Fig. 3 is an enlarged transverse sectional elevation through the motor. Fig. 4 is an enlarged transverse sectional elevation'of a vaporizer employed. y Fig. 5 is a cross-section 0f the motor-cylinder. Fig. 6 is a cross-section of a cylinder of modified construction. Fig. 7 is a perspective view of the bicycleframe. Fig. 3. Fig. 9 is a longitudinal section of -a modiiied form of muftlenemployed, and Fig. 10 is a cross-section thereof.

The frame of the bicycle comprises the usual top bar 10, the rear fork members 11, the bottom front brace 12, and the socket member 13 for the front fork 14. The central verti-vcal brace comprises the socket 15 for the seat-v post and a series of frame-bars 16, which connect at the lower end with the sleeve 17, in`

which the pedal-shaft is located. This frame 16 is designed to receive and support the motor, to be hereinafter described, and therefore itis obvious that the motor will be arranged between the front and rear wheels of the bicycle, and as the motor is quite small there will be but slight lateral projection, so that it-will not interfere with a ridersl legs.

The motor comprises a cylinder 18, having a dome-shaped top 19, providedwith a valve Fig. 8 is a section on the-line 8 8'of 20, which upon opening will permit the cscape of air when the machine is iirst started, as will be hereinafter described. Operating in the cylinder 18 is a piston 21, having its stem 22 connecting with fly-wheels 23 and 23, located in a casing 24. These iiy-wheels also serve ascranks, as the piston-stem 22'is connected therewith at one side of the shafts. One of the fly-wheels is connected to a shaft 25, while the other iiy-wheel is connected to a shaft 26, these shafts having bearin gs in the walls of the casing 24.

To provide for the radiation of heat and keep the interior of the cylinder 18 practically cocl, I provide on the outer sideof the cylinder a series of vertically-disposed radiating tubes27, open at the top and bottom. These radiating tubes 27, as shown in Fig. 5,

are attened at the sides and extend radially from the cylinder. In Fig. 6, however, I have shown cylindrical tubes 28, which serve the same purpose. Radiating tubes `29 also extend over the dome portion of the cylinder."

On the hub of the y-Wheel 23 is a pinion 30, engaging with a gear-wheel 31,0n the shaft 32 of which is a cam 33,designed for moving the exhaust-controlling valve 34 to its open position. This valve 34 controls the exhaust from the combustion chamber or dome 19 of the cylinder to the exhaust-chamber 35, from which a muffler extends, as will be hereinafter described. The stem'36 of the valve 34 extends downward, and.A between a collar 37 on the lower end of this stem and the bottom of the chamber 35 a spring 38 is-arranged, which is designed to move the valve to its closed position. Engaging with the lower end of this stem 36 is a rod 39, which moves through a guide 40 and has on its lower end a roller 41, which engages with the camr 33. A valve 42 operates to control the entrance of mixed gas and air to the combustion-chamber. This valve 42 is normally held in its seat in the upper -wall of the combustionchamber by means of a spring 43,wh-ich surrounds the stem of thevalve, engaging at its upper end with a collar on the upper end of said stem and at its lower end with aspider 44.

Supported on the bicycle-frame, as here iene-tank 45.

loo

f shown upon the rear forkmembers, is a gaso- From this tank a pipe 46 leads into the lower portion of a vaporizer-tank 47, also supported on the bicycle-frame. The bottom wall of this vaporizer-tank is provided with a series of perforations 48, through which air may pass, the said perforations or openings being controlled or more or less opened by means of a perforated valve-plate 49, pivotedon the bottom of the vaporizer. Within the vaporizer the pipe 46 has an upwardlyextended outlet-nipple 50, which is controlled by a spring-pressed valve 5l, and the passage of gasolene through the nipple 50 may be regulated by a screw-valve 52. The valve 51 is made conical, so as to provide a considerable surface for gas and air pressure required in moving it to an open position. Surrounding the stem of the valve is a spring 53, which bears at its lower end upon the valve and at its upper end engages with a tubular lug 54,attached to the top or cover of the vaporizer. From the upper portion ofthe vaporizer a pipe 55 leads to a connection with an elbow 56,communicating with the combustion-chamber, this communication being controlled by the valve 42. The elbow 56 may be conveniently held in place by means of a cap 57, having screw-thread engagement with an upward projection from the combustionchamber, and a screw 58, passing through the top of said cap, engages with the upper side of said elbow, as clearly illustrated in Fig. 3. Leading into the combustion-chamber are two sparking electrodes 59 and 60. The electrode 59 is in electrical connection with the cylinder and the frame, while the electrode 60 is insulated from the cylinder.

Mounted on the bottom brace member 12 of the bicycle-frame is a battery G1, from which wires 62 and 63 lead to the primary of an induction or sparking coil arranged in a casing 64, also attached to the said member 12. In one of the wires, here shown as the wire 63, is located a switch 65, said switch being attached to the member 13 of the bicycle-frame. From the secondary coil a wire 66 leads to a connection with the bicycleframe, and consequently to a connection with the cylinder and electrode 59, and also from the secondary coil a wire 67 leads to a connection with the electrode 60.

I make and break the current in the induction-coil by a vibrator in the form of a spring 68, mounted on an arm 69, of insulating material, which rocks on the shaft 32. The vibrator 68 is connected with the inductioncoil by a wire 70, while a contact-point 71 on the arm 69 is connected to the induction-coil by a wire 72. The vibrator 68 is operated or moved out of contact with the contact-point 71 by means of a cam-wheel 73, mounted on the shaft 32. This cam-wheel 73 has a notched portion which upon reaching the lug on the end of the vibrator allows said vibrator to move upward by its spring action to make an engagement with the contact 71. When the periphery of the cam, however, engages with said lug, the vibrator wil l be moved out of said contact. The object in mounting the vibrator on a swinging arm is to provide for rocking it with relation to the cam, so that the sparking may take place to ignite the discharge within the cylinder at desired positions of the piston-that is, by moving the outer end of the arm downward the position of the end of the vibrator will be changed with relation to the cam in such manner as to cause the igniting of the charge when the piston lis in a lower position than would be the case were the arm moved upward, bringing the end of the vibrator circumferentially in the opposite direction. The arm 69 is moved up or down by means of a rod 74, which extends upward from said arm and engages at its upper end with one member of an angle-lever 75, pivoted to the top bar 10, and from the other end of this angle-lever a rod 76 extends to a connection with a lever 77 on the bicyle member 10. The valve 2O is opened and closed by means of a rod 78, connecting at one end with the stem of the valve and at the other end with an angle or crank lever 79, pivoted to the member lO of the frame and from which a draw-rod 8O extends to a connection with a lever 8l, also pivoted to the said member lO of the frame.

Connecting with the exhaust-chamber is a muffler, which in Figs. 1 and 2 consists of a closely-coiled spring 82, in the outer end of which is a block 83, from which rods 84 ex tend and have sliding movement in alcollar 85, attached to a tube leading from the exhaustchamber. As the exhaust passes into the muffler the spring will be slightly expanded.

to allow the discharge of the exhaust, but will quickly close to prevent the entrance of atmospheric air, and thus prevent the usual noise of exhausting steam or the like.

In Figs. 9 and 10 I have shown a muiiier consisting of a tube 86, having aseries of perforations at the top and bottom,and connected to the sides of this tube and extended above and below the same are spring-plates 87. The said spring-plates meet at the top and bottom in a practically air-tight manner. The exhausting charge, however, will sufficiently separate them to permit of the escape, and after the escape the plates will close and prevent the entrance of air.

Connected to the shaft of the fly-wheel 23 is a pinion 88, meshing with a gear-wheel 89, which is connected to the cylindrical pedal crank-shaft 90, which is mounted to rotate in the sleeve 17, and has ball-bearing connection therewith in the usual manner. Extended through the cylindrical shaft 90 is a shaft 91,to which the pedal-cranks 92 are rigidly attached. On the ends of this shaft 91 are outwardly-extended teeth 93, having one straight surface or a surface extended at right angles to the axis of the shaft, while the opposite surface is curved. Rods or bars 94 extend along the shaft 91 and have en large'd ends which engage with the teeth 93, and these enlarged ends are held normally IIO IZO

and lightly against the curved surfaces of the teeth by means of springs 95, which are connected at their central portions to the shaft 91 by means of screws or otherwise, while the free ends engage with the rods 94. When the enlarged portions of these rods are in engagement with the curved portions of the teeth 93, as indicated in Fig. S, the pedalcranks may be held stationary while the cylindrical shaft 90 rotates freely around the shaft 91. When, however, it is desired to start the machine, the pedal-cranks are to be operated to move the shaft 91 in the direction indicated by the arrow in Fig. 8, which will cause the curved portions of the teeth to gradually engage with the rods 94, forcing them outward into tight frictional engagement with the inner side of the cylindrical shaft 90, so that said shaft will rotate with the shaft 91, consequently starting the flywheels and moving the piston 21 until a charge of gas shall have been delivered into the cylinder. On the cylindrical shaft 90 is a sprocket-wheel 96, from which a sprocketchain 97 passes to an engagement with a sprocket-wheel 98 on the rear wheel of the bicycle.

In operation after starting the bicycle by means of the pedal-cranks, as above mentioned, the valve 2O is to be opened to permit the escape of air that may be within the cylinder. This air will be forced outward by an upward movement of the piston. Upon a downward movement of the piston the valve 42 will be drawn open by suction, and the Valve 51 will also be moved by suction out of engagement with the nipple 50, so that the gasolene may pass into the vaporizer and mingle with the air therein. This mixed charge will pass through the pipe 55 into the combustion-chamber, and then when the sparking takes place between the electrodes the charge will be exploded, forcing the piston downward. Then through the momentum of the fly-wheels the piston will be moved upward, it being understood that the pedalgear-wheel 31 are so related that the exhaustvalve is only opened at every second upward movement of the piston.

Having thus described my invention, I claim as new and desire to secure by Letters Patent' l 1. In a motor-bicycle, a frame, comprising a vertical brace member having a socket-section for a seat=post, a series of arms extended downward from the socket-section, said arms being curved outward between their ends and arranged one pair forward of the other pair, and a motor supported between said arms, substantially as specified.

2. In a motor-bicycle, a frame, comprisingA a top bar, a bottom brace-bar, rear fork mem-v bers, a vertical center brace having a frame at its lower portion, a motor arranged in said frame, and a gasolene-tank supported 011 the rear fork members, substantially as specified.

VIn testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EMIL F. HAFELFINGER.

Witnesses:

EVERARD vBOLTON MARSHALL, C. R. FERGUSON. 

